Development and Validation of a Effective and Reliable HPLC Method for the Quantification of Levodopa and Carbidopa in Pharmaceutical Formulations

Yıl 2021, Sayı: 4, 413 - 422, 25.05.2021

İbrahim Bulduk , Süleyman Gökce

https://doi.org/10.15671/hjbc.795609

Cited By: 1

Öz

A convenient and simple high performance liquid chromatography method for simultaneous separation, determination and identification of levodopa and carbidopa in pharmaceutical formulation has been developed. The analysis was carried out using Ace C18 (4.6 x 250 mm, 5 µm) column, and the separation was performed using a mobile phase consisting of 50 mM KH2PO4 (pH 2.3) pumped at a flow rate of 1.2 mL min-1 with UV detection at 280 nm. The method has been successfully validated on the basis of the International Conference on Harmonization (ICH) acceptance criteria. The method is selective, since no interferences corresponding to these analytes were found at retention times. Retention times for both drugs were 2.939 min and 5.018 for levodopa and carbidopa, respectively. The method was validated and shown to be linear in the concentration range of 25-125 µg mL-1 and 6.25-31.25 µg mL-1 for levodopa and carbidopa, respectively. The method exhibited good linearity (R2 > 0.999) over the assayed concentration range and showed good intra-day and inter-day precision. The limit of detection (LOD) and limit of quantification (LOQ) were determined based on standard deviation of the intercept and the slope of the calibration curve. LOD and LOQ values were 0.70 µg mL-1 and 2.13 µg mL-1 for levodopa and 1.31 µg mL-1 and 3.96 µg mL-1 for carbidopa, respectively. The method's accuracy was tested by adding known volume of standard solution (75 percent, 100 percent, and 125 percent concentration of the sample) to the 100 percent concentration pre-analyzed sample solution. The percentage mean recovery by standard addition experiments of levodopa and carbidopa is 99.75% and 99.55%, respectively. This method has also been successfully used for the determination of levodopa and carbidopa in pharmaceutical formulations.

Anahtar Kelimeler

levodopa, carbidopa, validation, HPLC-UV

Kaynakça

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